Internal stress of high tungsten content Ni-W alloy coatings

This study investigates the impact of current density on the microstructure, composition, and internal stress of Ni-W alloys electrodeposited in a citrate system. Using XRD, SEM, EDS, TEM, and XPS, it was found that tungsten serves as a solute in a Ni-W FCC structure oriented in the (111) direction....

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Bibliographic Details
Published in:Surface engineering 2023-06, Vol.39 (6), p.769-779
Main Authors: Xu, Yingjun, Wang, Deyong, Sheng, Minqi, Wang, Huihua
Format: Article
Language:English
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Summary:This study investigates the impact of current density on the microstructure, composition, and internal stress of Ni-W alloys electrodeposited in a citrate system. Using XRD, SEM, EDS, TEM, and XPS, it was found that tungsten serves as a solute in a Ni-W FCC structure oriented in the (111) direction. Increasing current density led to higher tungsten content and current efficiency. The addition of 2-Butyne-1,4-diol altered the carbon content, significantly reducing internal stress by promoting carbide formation near grain boundaries, which prevented coating shrinkage during hydrogen escape. This carbon enrichment improved the alloy's corrosion resistance.
ISSN:0267-0844
1743-2944
DOI:10.1080/02670844.2023.2257855